package com.example.mvt;

import java.util.ArrayList;

import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;


import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.ParseException;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.view.inputmethod.EditorInfo;
import android.widget.EditText;
import android.widget.TextView;

/**
 * Activity which displays a login screen to the user, offering registration as
 * well.
 */
public class LoginActivity extends Activity {
	private static final String PHP_URL = "http://webdev.cs.uwosh.edu/students/meyers11/PHPLogin.php";

	/**
	 * Keep track of the login task to ensure we can cancel it if requested.
	 */
	private UserLoginTask mAuthTask = null;

	// Values for email and password at the time of the login attempt.
	
	private String mUsername;
	private String mPassword;

	// UI references.
	private EditText mUserView;
	private EditText mPasswordView;
	private View mLoginFormView;
	private View mLoginStatusView;
	private TextView mLoginStatusMessageView;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
 
		setContentView(R.layout.activity_login);

		// Set up the login form.
		mUserView = (EditText) findViewById(R.id.username);

		mPasswordView = (EditText) findViewById(R.id.password);
		mPasswordView.setOnEditorActionListener(new TextView.OnEditorActionListener() {
					@Override
					public boolean onEditorAction(TextView textView, int id,
							KeyEvent keyEvent) {
						if (id == R.id.login || id == EditorInfo.IME_NULL) {
							attemptLogin();
							return true;
						}
						return false;
					}
				});

		mLoginFormView = findViewById(R.id.login_form);
		mLoginStatusView = findViewById(R.id.login_status);
		mLoginStatusMessageView = (TextView) findViewById(R.id.login_status_message);

		findViewById(R.id.sign_in_button).setOnClickListener(
				new View.OnClickListener() {
					@Override
					public void onClick(View view) {
						attemptLogin();
					}
				});
		
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		super.onCreateOptionsMenu(menu);
		getMenuInflater().inflate(R.menu.login, menu);
		return true;
	}

	/**
	 * Attempts to sign in or register the account specified by the login form.
	 * If there are form errors (invalid email, missing fields, etc.), the
	 * errors are presented and no actual login attempt is made.
	 */
	public void attemptLogin() {
		if (mAuthTask != null) {
			return;
		}

		// Reset errors.
		mPasswordView.setError(null);

		// Store values at the time of the login attempt.
		mUsername = mUserView.getText().toString();
		mPassword = mPasswordView.getText().toString();

		boolean cancel = false;
		View focusView = null;

		// Check for a valid password.
		if (TextUtils.isEmpty(mPassword)) {
			mPasswordView.setError(getString(R.string.error_field_required)); 
			focusView = mPasswordView;
			cancel = true;
		} else if (mPassword.length() < 4) {
			mPasswordView.setError(getString(R.string.error_invalid_password));
			focusView = mPasswordView;
			cancel = true;
		}

		// Check for a valid email address.
		if (TextUtils.isEmpty(mUsername)) {
			mUserView.setError(getString(R.string.error_field_required));
			focusView = mUserView;
			cancel = true;
		} else if (mUsername.equals("")) {
			mUserView.setError(getString(R.string.error_field_required));
			focusView = mUserView;
			cancel = true;
		}

		if (cancel) {
			// There was an error; don't attempt login and focus the first
			// form field with an error.
			focusView.requestFocus();
		} else {
			// Show a progress spinner, and kick off a background task to
			// perform the user login attempt.
			mLoginStatusMessageView.setText(R.string.login_progress_signing_in);
			showProgress(true);
			mAuthTask = new UserLoginTask();
			mAuthTask.execute(mUsername, mPassword, null);
		}
	}

	/**
	 * Shows the progress UI and hides the login form.
	 */
	@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
	private void showProgress(final boolean show) {
		// On Honeycomb MR2 we have the ViewPropertyAnimator APIs, which allow
		// for very easy animations. If available, use these APIs to fade-in
		// the progress spinner.
		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
			int shortAnimTime = getResources().getInteger(
					android.R.integer.config_shortAnimTime);

			mLoginStatusView.setVisibility(View.VISIBLE);
			mLoginStatusView.animate().setDuration(shortAnimTime)
					.alpha(show ? 1 : 0)
					.setListener(new AnimatorListenerAdapter() {
						@Override
						public void onAnimationEnd(Animator animation) {
							mLoginStatusView.setVisibility(show ? View.VISIBLE
									: View.GONE);
						}
					});

			mLoginFormView.setVisibility(View.VISIBLE);
			mLoginFormView.animate().setDuration(shortAnimTime)
					.alpha(show ? 0 : 1)
					.setListener(new AnimatorListenerAdapter() {
						@Override
						public void onAnimationEnd(Animator animation) {
							mLoginFormView.setVisibility(show ? View.GONE
									: View.VISIBLE);
						}
					});
		} else {
			// The ViewPropertyAnimator APIs are not available, so simply show
			// and hide the relevant UI components.
			mLoginStatusView.setVisibility(show ? View.VISIBLE : View.GONE);
			mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE);
		}
	}

	/**
	 * Represents an asynchronous login/registration task used to authenticate
	 * the user.
	 */

		public class UserLoginTask extends AsyncTask<String, String, Boolean> {
			@Override
			protected Boolean doInBackground(String... params) {
				// TODO: attempt authentication against a network service.
				Boolean success = false;
				ConnectivityManager connMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
				NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
				
				if(networkInfo != null && networkInfo.isConnected())
				{
					ArrayList<NameValuePair> n = new ArrayList<NameValuePair>(1);
					n.add(new BasicNameValuePair("username", params[0]));
					
					HttpClient httpClient = new DefaultHttpClient();
					HttpPost httppost = new HttpPost(PHP_URL);
					
					try
					{
						httppost.setEntity(new UrlEncodedFormEntity(n));
						ResponseHandler<String> respondHandler = new BasicResponseHandler();
						String response = httpClient.execute(httppost, respondHandler);

						//Parse JSON Data
						String id_pass = null;

						try{
							
							JSONArray jArray = new JSONArray(response);
							JSONObject json_data=null;
							json_data = jArray.getJSONObject(0);
							id_pass = json_data.getString("password");
				      	
						}catch(JSONException e1){
							e1.printStackTrace();
							System.out.println("FAIL1");
						}catch (ParseException e1){
							e1.printStackTrace();
							System.out.println("FAIL2");
						}
					
						if(id_pass.equals(params[1]))
						{
							success = true;
						}
		
					}
					catch(Exception e){
						System.out.println("Issue with logging in");
					}
				}
				
				return success;
			}

			@Override
			protected void onPostExecute(final Boolean success) {
				mAuthTask = null;
				showProgress(false);

				if (success) {				
					new insertLoginInfo().execute();
				} else {
					mPasswordView
							.setError(getString(R.string.error_incorrect_password));
					mPasswordView.requestFocus();
				}
			}

			@Override
			protected void onCancelled() {
				mAuthTask = null;
				showProgress(false);
			}
		}
		
		private class insertLoginInfo extends AsyncTask<Void, Void, String>{
			@Override
			protected String doInBackground(Void... nothing) {
				
				MVTDataSource mds2 = new MVTDataSource(LoginActivity.this);
				
				mds2.open();
				
				try {
					mds2.updateUser(mUsername,mPassword);
				} catch (Exception e) {
					e.printStackTrace();
				}
				
				mds2.close();
				
				return "";
			}
			
			@Override
			protected void onPostExecute(String whatever) {
				if (mUsername.equals("admin")){
					Intent myIntent = new Intent(LoginActivity.this, AdminActivity.class);
					startActivityForResult(myIntent, 0);
				}
				else{
					Intent myIntent2 = new Intent(LoginActivity.this, MainActivity.class);
					startActivityForResult(myIntent2, 0);
				}
				finish();
			}
			
		}
}
